[libcamera-devel] [PATCH v3 3/3] android: camera_device: Report sensor physical size

[Jacopo Mondi]

Calculate the value of the ANDROID_SENSOR_INFO_PHYSICAL_SIZE property
multiplying the number of sensor's readable pixels with the pixel unit
cell size if provided by the Camera.

Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
 src/android/camera_device.cpp | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
index 5fbf6f82ee9a..ef5ed37e829a 100644
--- a/src/android/camera_device.cpp
+++ b/src/android/camera_device.cpp
@@ -940,6 +940,15 @@ const camera_metadata_t *CameraDevice::getStaticMetadata()
 		};
 		staticMetadata_->addEntry(ANDROID_SENSOR_INFO_PIXEL_ARRAY_SIZE,
 					  data.data(), data.size());
+
+	std::vector<float> physicalSize(2);
+	if (properties.contains(properties::UnitCellSize)) {
+		const Size &unitCellSize =
+			properties.get<Size>(properties::UnitCellSize);
+		physicalSize[0] = unitCellSize.width * pixelArraySize[0] / 1e6f;
+		physicalSize[1] = unitCellSize.height * pixelArraySize[1] / 1e6f;
+		staticMetadata_->addEntry(ANDROID_SENSOR_INFO_PHYSICAL_SIZE,
+					  physicalSize.data(), physicalSize.size());
 	}
 
 	{
@@ -987,13 +996,6 @@ const camera_metadata_t *CameraDevice::getStaticMetadata()
 				  testPatterModes.data(),
 				  testPatterModes.size());
 
-	std::vector<float> physicalSize = {
-		2592, 1944,
-	};
-	staticMetadata_->addEntry(ANDROID_SENSOR_INFO_PHYSICAL_SIZE,
-				  physicalSize.data(),
-				  physicalSize.size());
-
 	uint8_t timestampSource = ANDROID_SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN;
 	staticMetadata_->addEntry(ANDROID_SENSOR_INFO_TIMESTAMP_SOURCE,
 				  &timestampSource, 1);
-- 
2.30.0